Effelsberg 100m Teleskop

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**Technical Documentation of the 30cm  Receiver 800- 1300 MHz (P300mm)**
|Type|HEMT, uncooled|
|Channels|2|
|Receiver Noise Temperature|50 K - 95K (see table)|
|Frequency Range|0.8 - 1.3 GHz|
|Bandwidth RF-Filters-fixed|0.8 - 1.3 GHz|
|Polarization|LHC and RHC|
|Calibration|Noise Diode after 1. Amplifier|
|feed|Dipole System|
|1. Oscillator|	ULO1| 
|1. IF|600-700 MHz|
|2. Oscillator|	ULO2|
|2. IF|100 - 200 MHz|
 
====== Block Diagram ======
{{:electronics:rx:techinfo:p300mm_block_diagram.jpg|}}

**Receiver Noise Temperature**

{{:electronics:rx:techinfo:p300mm_noise_temperature.jpg|}}

**Commenets**
>The noise measurements were made in the laboratory with 2 MHz bandwidth and refer to the feed.

This system was constructed particularly for VLBI, but was already used during test measurements also for spectroscopy, continuum and pulsar observations. This frequency range is not free of interference. Observers wanting to do continuum or pulsar observations might have to search for a frequency range not obstructed by interference and/or use a narrower bandwidth.

This system is part of Primary Focus Multi Frequency Box #2 (PM2).

Effelsberg 100m Teleskop

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